The third sketch is a Deep Sea Angler (Lantern Fish) Mask. It kind like a mask. Because there is a light hang in front of the face of Lantern fish, I am trying to put a Green LED into a Ping-Pong ball as the front light. Like the second sketch, when someone comes close, the LED will on and you can all the face of the fish. Component: PIR sensors, 1 Green LED, 4.5V Battery, 1 kΩ Resistor.